hey geeks help me out.... all was fine till two months back... long before when i went on a long long leave ... leaving my pc alone for two months... but now when i started it... it started and now switches off all of a sudden without any warning..... not even the BSOD..... n restarts with the monitor giving the first msg as out of frequency n then the same prob again...

i tried resetting the monitor resolution to 800x600 everywhere... i.e. the desktop resolution and the monitor settings... but no joy... can anyone guess what could be the prob.....